Ore pulp jig



March 2, 1943. e. e. CHISHOLM ORE PULP JIG Filed Oct. 24, 1940 I-nu Bntnr' I3. [5. EHIEHHLM Patented Mar. 2, 1943 UNITED STATES ATENT UFFICE ORE PULP HG Gilbert G. Chisholm, London, Ontario, Canada Application October 24, 1940, Serial No. 362,673

17 Claims.

My invention relates to improvements in ore pulp jigs and an object of my invention is to de vise an improved apparatus for augmenting the thickening or concentration of the ore pulp treated therein resulting in a very high recovery of the valuable concentrates.

A further object is to originate an apparatus which, incorporating a variety of pump or dasher for the ore pulp, will increase the rate of speed at which the lighter or waste particles of the pulp are rejected and flowed out of the apparatus.

A still further object is to device an apparatus which will be exceedingly flexible in operation and which can be regulated to pass through or reject any desired portion of the pulp thus ensuring a clean high ratio concentrate.

With the above and other objects in view which will hereinafter appear as my invention proceeds, my invention, in its preferred embodiment, consists of the construction and arrangement all as hereinafter more particularly described and i1- lustrated in the accompanying drawing in which:

Fig. 1 represents a side elevation of my apparatus showing the means for vibrating it vertically.

Fig. 2 is a vertical section through the apparatus, the vibrating means being absent and the inner or dashercone being shown in elevation.

- Fig. 3 as. top plan view of the apparatus.

Fig. 4-is a vertical section through the dasher cone, and

Fig. 5 is an enlarged vertical section through the throat of the conical jig casing showing a screen and shot bed inserted thereinto.

Like characters of reference indicate corresponding parts in the different views of the drawing.

" The instant construction of jig is somewhat similar to that described and claimed in my copending application Serial No. 347,314, being operated by a vibrating motor and the casing being provided with a launder to receive the lighter particles of the pulp overflowing the cas ing. It differs from the former construction, however, in the proportional dimensions of the casing, in the provision of a dasher cone instead of the inner tube and in the addition of a shot bed and screen in the throat of the conical casing.

I Referring to the drawing an inverted truncated conical casing I to receive the pulp is provided with a cylindrical lower portion 2 having a valve regulated outlet 3 for the valuable. concentrates; I find that an inverted truncated conical casing I in which the height of the truncated cone is four times the diameter of its smaller end gives decidedly the best results.

A screen 4 supported on a removable thimble 5 is inserted into the casing I in the vicinity of its throat, a gasket 5 being interposed between the thimble and the casing wall. The screen 5 acts as a support for a shot bed I.

An inclined circular launder 8' surrounds the upper lip of the casing I and has a discharge 9.

The casing I is suitably supported in a vertical position as for instance by the guides Ie extending freely through a flange II secured to said casing.

The cylindrical lower portion 2 of the casing is provided with a downwardly extending member I2 secured to the armature I 3 of the vibrating motor I 4.

A hollow inverted truncated conical dasher member I5 i centred in the upper part of the casing by being provided with upper ribs I6 and lower outwardly extending legs H which engage the casing wall thus leaving an annular space between the hollow dasher member and such wall. Owing to the taper of the casing being much steeper than that of the dasher member, the annular space gradually decreases in area from the lower end of the-dasher member to its top.

The top of the dasher member is provided with a plugged filling orifice or orifices I8 so that water or other suitable material may be introduced into the dasher member to weight itso that it is just heavier than the ore pulp. A vertical pulp feed tube I9 extends axially through the dasher member, the pulp being introduced at the top by gravity and falling through the tube into the casing I. Such casing I has a water inlet 26 disposed in the cylindrical lower portion 2 below the screen 4 for the introduction of a pulsating or continuous water supply.

The dasher member I5 is free to move vertically in the casing I and the vertical thrust of the vibrating motor throws it upward, the force of gravity causing it to move downwardly against these rapid and repeated upward thrusts. ihus the pulp in the casing is affected by the pumping or dasher action of the dasher member which ensues. As there is a greater space between the casing wall and the lower extremity of the dasher member the pumping action here, where the pulp concentration takes place, is at a minimum but sufficient to start the lighter particles of the pulp moving upwardly, aided by the overflowing action of the added pulp caused by vertical thrusts of the vibrating motor. As these pulp particles move upwardly the space between the casing wall and the dasher member becomes more constricted and hence the rising of these particles is expedited as the same volume of pulp must pass through a much smaller space. Such action greatly increases the eificiency of the apparatus as waste products are rejected more rapidly, the concentrating action is not aifected but assisted owing to it being possible to obtain a much cleaner concentrate without using too much Water; Furthermore, the apparatus cannot be choked by too rapid a flow of pulp and too rapid settling and thickening of the pulp particles which would occur in that case.

The shot bed is compacted by the action of the vibrating motor and alternately opened up by the pressure of the water flow from the inlet 20.

The effect of the screen is to hold all heavier particles of pulp above it while the lighter particles are rising and overflowing into the launder. All except the very heavy particles are rejected into this rising pulp and these heavier particles (which are the valuable concentrates) settle through the shot bed and screen during the time the water flow occurs and against the upward thrust of such water which is preferably pulsating. Such'action is susceptible to close regulation by varying the intensity of the thrust of the vibrating motor, by the thickness of the shot bed, by the amount of pulsating water added and by varying the introduction periodicity of such pulsating water.

The valuable concentrates are thus deposited into the lower part of the cylindrical portion 2 of the casing i and can be drawn ofi through the outlet 3.

What I claim as my invention is:

1. An ore pulp jig, an inverted truncated conical ore pulp receiving casing open at its top and adapted to be vertically vibrated, means for vi.- brating said casing, a launder surrounding the open top of the casing, said casing having a lower cylindrical extension connecting with its smaller end whereby a throat is constituted, a shot bed supported in said throat, a water inlet in the cylindrical extension below such shot bed, a concentrate outlet in such cylindrical extension, and a plunger freely reciprocable axially in the casing and forming therewith a restricted discharge passageway between the top and interior of the casing for discharging lighter material of an ore pulp mixture carried within the casing, to the launder, and means for introducing an ore pulp mixture to the casing.

2. An ore pulp jig, an inverted truncated conical ore pulp receiving casing open at its top and adapted to be vertically vibrated, means for vibrating said casing, a launder surrounding the open top of the casing, said casing having a lower cylindrical extension connecting with its smaller end whereby a throat is constituted, a shot bed supported in said throat, a water inlet in the cylindrical extension below such shot bed, a concentrate outlet in such cylindrical extension, and an inverted truncated conical plunger freely reciprocable axially in the casing passageway between the top and interior of the casing for discharging lighter material of an ore pulp mixture carried within the casing, to the launder, and means for introducing an ore pulp mixture to the casing.

V and forming therewith a restricted discharge 3. An ore pulp jig, an inverted truncated conical ore pulp receiving casing open at its top and adapted to be vertically vibrated, means for vibrating said casing, a launder surrounding the open top of the casing, said casing having a lower cylindrical extension connecting with its smaller end whereby a throat is constituted, a shot bed supported in said throat, a water inlet in the cylindrical extension below such shot bed, a concentrate outlet in such cylindrical extension, an inverted truncated conical plunger ireeely reciprocable axially in the casing, and means on the dasher member, for centering said member in the casing in spaced relation thereto to form with the casing a restricted discharge passageway between the top and the interior of the casing for discharging lighter material of an ore pulp mixture' contained within the casing, to the launder, and means for introducing an ore pump mixture to the casing.

4. An ore pulp jig, an inverted truncated conical ore pulp receiving casing open at its top and adapted to be vertically vibrated, means for wbrating said casing, a launder surrounding the open top of the casing, said casing having a lower cylindrical extension connecting with its smaller end whereby a throat is constituted, a shot bed supported in said throat, a water inlet in the cylindrical extension below such shot bed, a concentrate outlet in such cylindrical extension,

an inverted truncated conical hollow plunger freely reciprocable axially in the casing, aninlet to the interior of the dasher member, and means for centering the dasher member in the casing in spaced relation thereto to form with the casing a restricted discharge passageway between the top and the interior ofthe casing for discharging lighter material of an ore pulp mixture contained within the casing, to the launder, and means for introducing an ore pulp mixture to the casing. I

5. An ore pulp jig, an inverted truncated conical ore pulp receiving casing open at its top and adapted to be vertically vibrated, meansfor vibrating said casing, a launder surrounding the open top of the casing, said casing having a lower cylindrical extension connecting with its smaller end whereby a'throat is constituted, a shot bed supported in said throat, a water inlet in the cylindrical extension below such shot bed, a concentrate outlet in such cylindrical extension, and an inverted truncated conical plunger freely reciprocable axially in the casing and spaced from the latter to form a restricted passageway extending between the top and the interior of the casing for discharging lighter material of an ore pulp mixture contained within the casing, to the launder, the taper of the casing being substantially steeper than the taper of the dasher member whereby said passageway is restricted to an increasing extent towards the top of the casing, and means for introducing ore pulp to the easmg. V 1

6. An ore pulp jig, an inverted truncated con ical ore pulp receiving casing open at its top and adapted to be vertically vibrated, means for .vibrating said casing, a launder surrounding the open top of the casing, said casing having a lower cylindrical extension connecting with its smaller end whereby a throat is constituted, a shot bed supported in said throat, a water inlet in the cylindrical extension below suchshot bed, a concentrate outlet in such, cylindrical extension, a dasher member freely reciprocable axially in the casing and spaced from the latter to form a l restricted passageway extending between the top and interior of the casing for discharging lighter material of an ore pulp mixture contained within the casing, to the launder, and an ore pulp feed tube extending axially through the dasher member.

7. An ore pulp jig, an inverted truncated conical ore pulp receiving casing open at its top and adapted to be vertically vibrated, means for vibrating said casing, a launder surrounding the open top of the casing, said casing having a lower cylindrical extension connecting with its smaller end whereby a throat is constituted, a shot bed supported in said throat, a water inlet in the cylindrical extension below such shot bed, a concentrate outlet in such cylindrical extension, an inverted truncated conical plunger freely reciprocable axially in the casing and spaced from the latter to form a restricted passageway extending between the top and interior of the casing for discharging lighter material of an ore pulp mixture contained within the casing, to the launder, and an ore pulp feed tube extending axially through the dasher member.

8. An ore pulp jig, an inverted truncated conical ore pulp receiving casing open at its top and adapted to be vertically vibrated, means for vibrating said casing, a launder surrounding the open top of the casing, said casing having a lower cylindrical extension connecting with its smaller end whereby a throat is constituted, a shot bed supported in said throat, a water inlet in the cylindrical extension below such shot bed, a concentrate outlet in such cylindrical extension, an inverted truncated conical plunger freely reciprocable axially in the casing and spaced from the latter to form a restricted passageway extending between the top and the interior of the casing for discharging lighter material of an ore pulp mixture contained within the casing, to the launder the taper of the casing being substantially steeper than the taper of the dasher member whereby said passageway is restricted to an increasing extent towards the top of the casing, and an ore pulp feed tube extending axially through the dasher member.

9. An ore pulp jig comprising an ore pulp receiving casing open at its top and adapted to be vertically vibrated, means for vibrating said casing, said casing having a lower extension of smaller cross sectional area than the casing whereby a throat is constituted, a shot bed supported in said throat, a water inlet in the extension below such shot bed, a concentrate outlet in said extension and a plunger freely reciprocable in the upper part of the casing and spaced from the inner surface thereof to form therewith a restricted passageway surrounding said plunger and extending between the top and the interior of the casing for discharging lighter material of an ore pulp mixture from the casing and means for introducing an ore pulp mixture to the casing.

10. In an ore pulp jig, an ore pulp receiving casing adapted to be vertically vibrated, means for vibrating said casing and vertical reciprocable means in the casing for exerting a pumping or dashing action on the pulp therein in an upward direction, said vertical reciprocal means being spaced from the casing to form therewith a restricted passageway surrounding said plunger and communicating between the interior of the casing and a pulp discharge at :the top thereof, said passageway being gradually restricted towards the top of the casing and a passageway extending vertically through said vertically reciprocal means for feeding pulp to the casing below said reciprocal means, the fine pulp being forced rapidly through said passageway to discharge by said pumping action.

11. In an ore pulp jig, an ore pulp receiving casing open at its top to form a pulp discharge, means for vibrating said casing vertically, a plunger in the upper portion of said casing adjacent said discharge and freely reciprocable in such casing, said plunger being spaced from the casing to form therewith a restricted passageway surrounding the plunger and communicating between the interior of the casing and its open top, and means for feeding ore pulp into the casing below said plunger, said plungerbeing caused to reciprocate with the vibration of the casing to force fine pulp rapidly through said passageway to said discharge.

12. In an ore pulp jig, a vertical truncated conical ore pulp reeciving casingopen at its top to form a pulp discharge, means for vibrating said casing vertically, an inverted truncated conical plunger in the upper portion of said casing adjacent said discharge and freely reciprocable in such casing, said plunger being spaced from the casing to form therewith a restricted passageway surrounding the plunger and communicating between the interior of the casing and its open top, said passageway being gradually restricted towards the open top, and means for feeding ore pulp into the casing below said plunger, said plunger being caused to reciprocate with the vibration of the casing to force fine pulp rapidly through said passageway to said discharge.

13. An ore pulp jig as claimed in claim 12 wherein the taper of the casing is substantially steeper than the taper of the plunger.

14. An ore pulp jig as claimed in claim 12 wherein the length of the inverted truncated conical casing is four times the diameter of its smaller end.

15. An ore pulp jig, as claimed in claim 12 wherein the plunger is hollow, and an inlet to its interior is provided for the introduction of weighting material.

16. An ore pulp jig as claimed in claim 12 wherein an ore pulp feed tube for introducing the ore pulp to the casing extends axially through the plunger.

17. An ore pulp jig as claimed in claim 12 wherein means is provided on the plunger for centering it in the casing in spaced relation thereto.

GILBERT G. CHISHOLM. 

